I just got this puffer in the mail today, the bag had hardly any air in it so I tried to work fast. I floated him for about 10 min and drip acclimated him for I’d say 45min doubling the water volume twice. I did not net him or remove him from the water he did not puff up at all. He was swimming around in the tubaware i acclimated him at first. When I doubled the water volume the second time I found him laying at the bottom of the tub. I poured him to to qt he sank right down and is breathing heavily. I have the light off as to not stress him further. What should I do I’m worried he is going to die. I also have a small goby in here and he already seems to be swimming a bit.